TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 13 Carefully remove observation windows (28 and only if damaged. CLEANING Clean all parts per TM 9-254. REPAIR 1 If cover is broken, damaged, or missing, repair is by replacement of next higher assembly. 2 Repair is by replacement of authorized parts as required. Refer to appendix B. REASSEMBLY 1 If removed, apply sealing compound (item 10, appx C) to edges of observation windows (1 and 2). 2 Install observation windows (1 and 2) in cover (3). Remove excess sealing compound. 5-21